Title:
【発明の名称】電気モータ式駆動装置
Document Type and Number:
Japanese Patent JP2001505400
Kind Code:
A
Abstract:
The electric motor drive includes an electric motor (10); an end stage (12) for triggering the electric motor; a trigger circuit (18) for pulse-width-modulated triggering of the end stage, which is associated with the end stage (12) and which includes an overload stage (20) for detecting an overload on the electrical motor according to a temperature of the electric motor and a device for obtaining a temperature from a pulse-width-modulation signal (16) generated by the trigger circuit (18). A preferred embodiment includes a device for integrating a differential power (Pdiff) equal to an instantaneous power (Pmom) minus an equipment specific limit power (Plimit) in predetermined time intervals to obtain an integrated power (Pnew). The motor is turned on or off by comparison of the integrated power with various limiting values.
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Inventors:
Rolf Mac
Application Number:
JP51726299A
Publication Date:
April 17, 2001
Filing Date:
August 07, 1998
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
H02H6/00; H02H7/085; H02P3/08; H02P7/06; (IPC1-7): H02H7/085; H02H6/00; H02P3/08; H02P7/06
Attorney, Agent or Firm:
Toshio Yano (3 outside)